Inhaler for anesthetics.



PATENTED AUG. 9, 1904.

G. L. BENNETT. INHALBR FOR ANE'STHETIGS.

Irma/fiar m5/M w l APPLICATION FILED DEO. 7, 1903.

l.. wwm/ai! N0 MODEL.

iwf/M5565 Patented August 9, 1904.

NITED :STATES PATENT @einen GEORGE L. BENNETT, OF CHICAGG, lLLINOlS.

INHALER FOR AN ESTH ETICS.

SPECIFICATION forming part of Letters Patent No. 766,86*?, dated August9, 1904.

Application filed December '7, 1903. Serial No. 184,245. (No model.)

.To a/ZZ whom it may concern:

Beit known that I, Geenen L. BENNETT, a citizen of the United States,residing at Chicago, in the county of Cook and State of llli nois, haveinvented a new and useful Improve ment in Inhalers for Anesthctics, ofwhich the following' is a specification.

My invention is related to mechanical devices used in the practice ofsurgery; and the objects in my improvement are, first, to provide a moreconvenient and compact evaporator that can be carried in the surgeonspocket; second, to provide an evaporator that can be held in the hand,the heat of the hand causing the iiuids in use to evaporate morerapidly; third, to provide an evaporator that will enable the operatorto see at all times just what quantity of iiuid he has in it. l. attainthese objects by a mechanism illustrated in the accompanying' drawings,in whichi Figure l is a longitudinal sectional view of the entiredevice. Fig. 2 is a sectional view cut on line 3 3. Fig. 3 is asectional View taken on line 2 2.

Similar letters refer to similar' parts throughout the several views.

My invention consists in a cylindrical tube A, of glass or othersuitable material, havingI rims f g cemented externally to each end, therims being provided with screw-threads internally. Caps or plugs F G areinserted .in the ends by means of the screw. The small tube c is bent inthe shape of an elongated hook and fixed centrally in the plug Gr,extending into the cylinder half its length. The small cock e is thenV[ixed to the outer end of the tube, the cock having means forconnecting a hose 1, leading' to an air-compressor.

object of this arrangement is to enable the operator to change the nasalfork l) from the TheV vertical tube 71 to the horizontal tube o', replacing it with the cap l. This change is required when the patienttakes the anesthetic in a recumbent position. WV hen the patient sits ina chair, the device is used in the position shown in drawings.

The transverse tube o has another function. The device beingcylindrical, it would roll from the position where it was laid; but thetube being lixed at one side of the cylinder the tube forms a base forit to rest on.

rEhe cylinder A is provided with an opening J in one side, fitted with asuitable stopper, to enable the operator to spill in the anestheticfiuid.

The object of the hook-shaped tubes is to preclude the possibility ofspilling the iiuid out by accident or otherwise, as there will never bemore than one-half ounce of liuid in it at a time. They are `fixedlongitudinally in the same plane with the cylinder with both open endson the same side. However, they may be set at a right angle with thetransverse tube, so that when the evaporator is resting on the tube andnasal fork they will stand in a vertical position, open ends uppermost.

In operation connect a hose leading from an air-rcscrvoir with the cockon lower end of evaporator, spill into the chamber the quantity of fluidanesthetic required, the patient having been arranged in a reclining orVertical position, and the nasal fork adapted to the position ofthepatient by changing it from vertical to the horizontal tube, or thereverse, as the case may be. Turn on the air, and it will pass throughthe lirst hooked tube and be blown down on or into the liuid, causing itto evaporate and be taken up by the air and forced out through secondhooked tube to the nasal fork in the direction shown by arrows, the forkhaving been adjusted in nostrils of the patient. The flow of air may beregulated by the cock, it being an ordinary three-way cook having threesizes of discharge-ports. (Shown at E, Fig. l.)

As the operator knows exactly the quantity of anesthetic lluid he has inthe evaporator and the relative percentage of fresh air he can control,the danger of a collapse of patient is IOO one fixed centrally in thelower plug and one fixed eccentrically in the top plug,- said tubesextending into the said cylindrical reservoir, the transverse tubehaving a longitudinal, eX- tension, the movable nasal fork, the cockconnected with the projecting end of the tube C and means for connectinga hose substantially as described.

GEORGE L. BENNETT.

Vitnesses:

CHARLES C. BISHOP, M. E. GREGG.

